diff --git a/packages/phoenix/src/platform/node/filesystem.js b/packages/phoenix/src/platform/node/filesystem.js
index 85b9e84c..d8ae9994 100644
--- a/packages/phoenix/src/platform/node/filesystem.js
+++ b/packages/phoenix/src/platform/node/filesystem.js
@@ -20,7 +20,7 @@ import fs from 'fs';
 import path_ from 'path';
 
 import modeString from 'fs-mode-to-string';
-import { ErrorCodes, PosixError } from '../PosixError.js';
+import { ErrorCodes, PosixError } from '@heyputer/puter-js-common/src/PosixError.js';
 
 function convertNodeError(e) {
     switch (e.code) {
diff --git a/packages/phoenix/src/platform/puter/filesystem.js b/packages/phoenix/src/platform/puter/filesystem.js
index ca60e2fe..42271561 100644
--- a/packages/phoenix/src/platform/puter/filesystem.js
+++ b/packages/phoenix/src/platform/puter/filesystem.js
@@ -16,7 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-import { ErrorCodes, PosixError } from '../PosixError.js';
+import { ErrorCodes, PosixError } from '@heyputer/puter-js-common/src/PosixError.js';
 
 function convertPuterError(e) {
     // Handle Puter SDK errors
diff --git a/packages/phoenix/src/puter-shell/coreutils/errno.js b/packages/phoenix/src/puter-shell/coreutils/errno.js
index dd36d8dd..db74b2f6 100644
--- a/packages/phoenix/src/puter-shell/coreutils/errno.js
+++ b/packages/phoenix/src/puter-shell/coreutils/errno.js
@@ -16,7 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-import { ErrorCodes, ErrorMetadata, errorFromIntegerCode } from '../../platform/PosixError.js';
+import { ErrorCodes, ErrorMetadata, errorFromIntegerCode } from '@heyputer/puter-js-common/src/PosixError.js';
 import { Exit } from './coreutil_lib/exit.js';
 
 const maxErrorNameLength = Object.keys(ErrorCodes)
diff --git a/packages/phoenix/src/puter-shell/coreutils/touch.js b/packages/phoenix/src/puter-shell/coreutils/touch.js
index 8f15f13c..5b32067a 100644
--- a/packages/phoenix/src/puter-shell/coreutils/touch.js
+++ b/packages/phoenix/src/puter-shell/coreutils/touch.js
@@ -18,7 +18,7 @@
  */
 import { Exit } from './coreutil_lib/exit.js';
 import { resolveRelativePath } from '../../util/path.js';
-import { ErrorCodes } from '../../platform/PosixError.js';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
 
 export default {
     name: 'touch',
diff --git a/packages/phoenix/test/coreutils/errno.js b/packages/phoenix/test/coreutils/errno.js
index fbb63b53..34fc7867 100644
--- a/packages/phoenix/test/coreutils/errno.js
+++ b/packages/phoenix/test/coreutils/errno.js
@@ -19,7 +19,7 @@
 import assert from 'assert';
 import { MakeTestContext } from './harness.js'
 import builtins from '../../src/puter-shell/coreutils/__exports__.js';
-import { ErrorCodes, ErrorMetadata } from '../../src/platform/PosixError.js';
+import { ErrorCodes, ErrorMetadata } from '@heyputer/puter-js-common/src/PosixError.js';
 
 export const runErrnoTests = () => {
     describe('errno', function () {
diff --git a/packages/phoenix/src/platform/PosixError.js b/packages/puter-js-common/src/PosixError.js
similarity index 94%
rename from packages/phoenix/src/platform/PosixError.js
rename to packages/puter-js-common/src/PosixError.js
index 0fc136a5..3d026b8c 100644
--- a/packages/phoenix/src/platform/PosixError.js
+++ b/packages/puter-js-common/src/PosixError.js
@@ -1,9 +1,9 @@
 /*
  * Copyright (C) 2024  Puter Technologies Inc.
  *
- * This file is part of Phoenix Shell.
+ * This file is part of Puter.
  *
- * Phoenix Shell is free software: you can redistribute it and/or modify
+ * Puter is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published
  * by the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -16,7 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-export const ErrorCodes = {
+const ErrorCodes = {
     EACCES: Symbol.for('EACCES'),
     EADDRINUSE: Symbol.for('EADDRINUSE'),
     ECONNREFUSED: Symbol.for('ECONNREFUSED'),
@@ -37,7 +37,7 @@ export const ErrorCodes = {
 };
 
 // Codes taken from `errno` on Linux.
-export const ErrorMetadata = new Map([
+const ErrorMetadata = new Map([
     [ErrorCodes.EPERM, { code: 1, description: 'Operation not permitted' }],
     [ErrorCodes.ENOENT, { code: 2, description: 'File or directory not found' }],
     [ErrorCodes.EIO, { code: 5, description: 'IO error' }],
@@ -57,7 +57,7 @@ export const ErrorMetadata = new Map([
     [ErrorCodes.ECONNREFUSED, { code: 111, description: 'Connection refused' }],
 ]);
 
-export const errorFromIntegerCode = (code) => {
+const errorFromIntegerCode = (code) => {
     for (const [errorCode, metadata] of ErrorMetadata) {
         if (metadata.code === code) {
             return errorCode;
@@ -66,7 +66,7 @@ export const errorFromIntegerCode = (code) => {
     return undefined;
 };
 
-export class PosixError extends Error {
+class PosixError extends Error {
     // posixErrorCode can be either a string, or one of the ErrorCodes above.
     // If message is undefined, a default message will be used.
     constructor(posixErrorCode, message) {
@@ -141,3 +141,10 @@ export class PosixError extends Error {
         return new PosixError(ErrorCodes.ETIMEDOUT, message);
     }
 }
+
+module.exports = {
+    ErrorCodes,
+    ErrorMetadata,
+    errorFromIntegerCode,
+    PosixError,
+}